Claude Sonnet 5
$1,045.20 / month- Input cost
- $295.20
- Output cost
- $750.00
- Per 1,000 calls
- $34.84
- Pricing profile
- standard
Source-tracked model comparison
Claude Sonnet 5 vs GPT-5.6 Sol: how do agent-loop API costs compare?
Compare verified pricing and model limits for premium agent-loop cost across current providers. The cost example uses a ai agent loops workload and does not assume equal model quality.
Direct cost answer: Claude Sonnet 5 is estimated at $1,045.20 per month and gpt-5.6-sol at $2,988.00 for 6,000 input tokens, 2,500 output tokens, and 30,000 monthly requests. Claude Sonnet 5 is $1,942.80 lower under these assumptions. This does not identify a quality winner.
Tracked facts
Pricing and model limits
Prices are USD per 1M tokens under each model's verified default profile.
| Field | Claude Sonnet 5 | gpt-5.6-sol |
|---|---|---|
| Provider | Anthropic | OpenAI |
| API model ID | claude-sonnet-5 | gpt-5.6-sol |
| Input / 1M | $2.00 | $5.00 |
| Cached input / 1M | $0.20 | $0.50 |
| Output / 1M | $10.00 | $30.00 |
| Context window | 1,000,000 tokens | 1,050,000 tokens |
| Maximum output | 128,000 tokens | 128,000 tokens |
| Accepted input | text, image | text, image |
Example workload
AI agent loops cost scenario
6,000 input and 2,500 output tokens per request, 30,000 monthly requests, and 20% cached input.
gpt-5.6-sol
$2,988.00 / month- Input cost
- $738.00
- Output cost
- $2,250.00
- Per 1,000 calls
- $99.60
- Pricing profile
- standard / short context
Cost result: Claude Sonnet 5 is $1,942.80 lower per month for these assumptions. This is a price comparison, not a model-quality ranking.
Questions to answer before choosing
- How many calls complete a successful agent task?
- Which steps can route to a smaller model?
- Do long prompts trigger a different tracked pricing profile?
What this estimate leaves out
Treat monthly requests as model calls, not user tasks. Tool execution and external API charges are excluded.
Latency, reliability, output quality, retries, regional processing, and provider-specific tool charges can change the practical decision.